12.309 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.015 * * * [progress]: [2/2] Setting up program.
0.019 * [progress]: [Phase 2 of 3] Improving.
0.019 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 500.0 (- x y))
0.021 * * [simplify]: iteration  0 :  8  enodes  (cost  2 )
0.022 * * [simplify]: iteration  1 :  15  enodes  (cost  2 )
0.023 * * [simplify]: iteration  2 :  21  enodes  (cost  2 )
0.024 * * [simplify]: iteration  3 :  26  enodes  (cost  2 )
0.025 * * [simplify]: iteration  4 :  26  enodes  (cost  2 )
0.025 * [simplify]: Simplified to:
   (* 500.0 (- x y))
0.025 * * [progress]: iteration 1 / 4
0.025 * * * [progress]: picking best candidate
0.028 * * * * [pick]: Picked  #<alt (λ (x y) (* 500.0 (- x y)))>
0.028 * * * [progress]: localizing error
0.031 * * * [progress]: generating rewritten candidates
0.031 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.038 * * * [progress]: generating series expansions
0.038 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.038 * [approximate]: Taking taylor expansion of (* 500.0 (- x y)) in (x y) around 0
0.038 * [taylor]: Taking taylor expansion of (* 500.0 (- x y)) in y
0.038 * [taylor]: Taking taylor expansion of 500.0 in y
0.038 * [taylor]: Taking taylor expansion of (- x y) in y
0.038 * [taylor]: Taking taylor expansion of x in y
0.038 * [taylor]: Taking taylor expansion of y in y
0.038 * [taylor]: Taking taylor expansion of (* 500.0 (- x y)) in x
0.038 * [taylor]: Taking taylor expansion of 500.0 in x
0.038 * [taylor]: Taking taylor expansion of (- x y) in x
0.038 * [taylor]: Taking taylor expansion of x in x
0.038 * [taylor]: Taking taylor expansion of y in x
0.038 * [taylor]: Taking taylor expansion of (* 500.0 (- x y)) in x
0.038 * [taylor]: Taking taylor expansion of 500.0 in x
0.038 * [taylor]: Taking taylor expansion of (- x y) in x
0.038 * [taylor]: Taking taylor expansion of x in x
0.038 * [taylor]: Taking taylor expansion of y in x
0.038 * [taylor]: Taking taylor expansion of (* -500.0 y) in y
0.038 * [taylor]: Taking taylor expansion of -500.0 in y
0.038 * [taylor]: Taking taylor expansion of y in y
0.038 * [taylor]: Taking taylor expansion of 500.0 in y
0.039 * [taylor]: Taking taylor expansion of 0 in y
0.039 * [taylor]: Taking taylor expansion of 0 in y
0.039 * [approximate]: Taking taylor expansion of (* 500.0 (- (/ 1 x) (/ 1 y))) in (x y) around 0
0.039 * [taylor]: Taking taylor expansion of (* 500.0 (- (/ 1 x) (/ 1 y))) in y
0.039 * [taylor]: Taking taylor expansion of 500.0 in y
0.039 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
0.039 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.039 * [taylor]: Taking taylor expansion of x in y
0.039 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.039 * [taylor]: Taking taylor expansion of y in y
0.039 * [taylor]: Taking taylor expansion of (* 500.0 (- (/ 1 x) (/ 1 y))) in x
0.039 * [taylor]: Taking taylor expansion of 500.0 in x
0.039 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
0.039 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.039 * [taylor]: Taking taylor expansion of x in x
0.039 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.039 * [taylor]: Taking taylor expansion of y in x
0.039 * [taylor]: Taking taylor expansion of (* 500.0 (- (/ 1 x) (/ 1 y))) in x
0.039 * [taylor]: Taking taylor expansion of 500.0 in x
0.039 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
0.039 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.039 * [taylor]: Taking taylor expansion of x in x
0.039 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.039 * [taylor]: Taking taylor expansion of y in x
0.040 * [taylor]: Taking taylor expansion of 500.0 in y
0.040 * [taylor]: Taking taylor expansion of (neg (* 500.0 (/ 1 y))) in y
0.040 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in y
0.040 * [taylor]: Taking taylor expansion of 500.0 in y
0.040 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.040 * [taylor]: Taking taylor expansion of y in y
0.040 * [taylor]: Taking taylor expansion of 0 in y
0.040 * [taylor]: Taking taylor expansion of 0 in y
0.041 * [taylor]: Taking taylor expansion of 0 in y
0.041 * [approximate]: Taking taylor expansion of (* 500.0 (- (/ 1 y) (/ 1 x))) in (x y) around 0
0.041 * [taylor]: Taking taylor expansion of (* 500.0 (- (/ 1 y) (/ 1 x))) in y
0.041 * [taylor]: Taking taylor expansion of 500.0 in y
0.041 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
0.041 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.041 * [taylor]: Taking taylor expansion of y in y
0.041 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.041 * [taylor]: Taking taylor expansion of x in y
0.041 * [taylor]: Taking taylor expansion of (* 500.0 (- (/ 1 y) (/ 1 x))) in x
0.041 * [taylor]: Taking taylor expansion of 500.0 in x
0.041 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
0.041 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.041 * [taylor]: Taking taylor expansion of y in x
0.041 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.041 * [taylor]: Taking taylor expansion of x in x
0.041 * [taylor]: Taking taylor expansion of (* 500.0 (- (/ 1 y) (/ 1 x))) in x
0.041 * [taylor]: Taking taylor expansion of 500.0 in x
0.041 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
0.041 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.041 * [taylor]: Taking taylor expansion of y in x
0.041 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.041 * [taylor]: Taking taylor expansion of x in x
0.041 * [taylor]: Taking taylor expansion of -500.0 in y
0.041 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in y
0.041 * [taylor]: Taking taylor expansion of 500.0 in y
0.041 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.041 * [taylor]: Taking taylor expansion of y in y
0.042 * [taylor]: Taking taylor expansion of 0 in y
0.042 * [taylor]: Taking taylor expansion of 0 in y
0.042 * [taylor]: Taking taylor expansion of 0 in y
0.042 * * * [progress]: simplifying candidates
0.043 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 500.0 (- x y))
  (+ (log 500.0) (log (- x y)))
  (log (* 500.0 (- x y)))
  (exp (* 500.0 (- x y)))
  (* (* (* 500.0 500.0) 500.0) (* (* (- x y) (- x y)) (- x y)))
  (* (cbrt (* 500.0 (- x y))) (cbrt (* 500.0 (- x y))))
  (cbrt (* 500.0 (- x y)))
  (* (* (* 500.0 (- x y)) (* 500.0 (- x y))) (* 500.0 (- x y)))
  (sqrt (* 500.0 (- x y)))
  (sqrt (* 500.0 (- x y)))
  (* (sqrt 500.0) (sqrt (- x y)))
  (* (sqrt 500.0) (sqrt (- x y)))
  (* 500.0 x)
  (* 500.0 (neg y))
  (* 500.0 x)
  (* 500.0 (neg y))
  (* x 500.0)
  (* (neg y) 500.0)
  (* x 500.0)
  (* (neg y) 500.0)
  (* 500.0 (* (cbrt (- x y)) (cbrt (- x y))))
  (* 500.0 (sqrt (- x y)))
  (* 500.0 1)
  (* 500.0 (+ (sqrt x) (sqrt y)))
  (* 500.0 1)
  (* (cbrt 500.0) (- x y))
  (* (sqrt 500.0) (- x y))
  (* 500.0 (- x y))
  (* 500.0 (- (pow x 3) (pow y 3)))
  (* 500.0 (- (* x x) (* y y)))
  (- (* 500.0 x) (* 500.0 y))
  (- (* 500.0 x) (* 500.0 y))
  (- (* 500.0 x) (* 500.0 y))
0.045 * * [simplify]: iteration  0 :  112  enodes  (cost  98 )
0.048 * * [simplify]: iteration  1 :  460  enodes  (cost  88 )
0.057 * * [simplify]: iteration  2 :  1881  enodes  (cost  88 )
0.085 * * [simplify]: iteration  3 :  5001  enodes  (cost  88 )
0.087 * [simplify]: Simplified to:
   (* 500.0 (- x y))
  (log (* 500.0 (- x y)))
  (log (* 500.0 (- x y)))
  (exp (* 500.0 (- x y)))
  (pow (* 500.0 (- x y)) 3)
  (* (cbrt (* 500.0 (- x y))) (cbrt (* 500.0 (- x y))))
  (cbrt (* 500.0 (- x y)))
  (pow (* 500.0 (- x y)) 3)
  (sqrt (* 500.0 (- x y)))
  (sqrt (* 500.0 (- x y)))
  (* (sqrt 500.0) (sqrt (- x y)))
  (* (sqrt 500.0) (sqrt (- x y)))
  (* 500.0 x)
  (* 500.0 (neg y))
  (* 500.0 x)
  (* 500.0 (neg y))
  (* 500.0 x)
  (* 500.0 (neg y))
  (* 500.0 x)
  (* 500.0 (neg y))
  (* 500.0 (* (cbrt (- x y)) (cbrt (- x y))))
  (* 500.0 (sqrt (- x y)))
  500.0
  (* 500.0 (+ (sqrt x) (sqrt y)))
  500.0
  (* (cbrt 500.0) (- x y))
  (* (sqrt 500.0) (- x y))
  (* 500.0 (- x y))
  (* 500.0 (- (pow x 3) (pow y 3)))
  (* 500.0 (- (* x x) (* y y)))
  (* 500.0 (- x y))
  (* 500.0 (- x y))
  (* 500.0 (- x y))
0.087 * * * [progress]: adding candidates to table
0.120 * * [progress]: iteration 2 / 4
0.121 * * * [progress]: picking best candidate
0.123 * * * * [pick]: Picked  #<alt (λ (x y) (+ (* 500.0 x) (* 500.0 (neg y))))>
0.123 * * * [progress]: localizing error
0.132 * * * [progress]: generating rewritten candidates
0.132 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.136 * * * [progress]: generating series expansions
0.136 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.136 * [approximate]: Taking taylor expansion of (- (* 500.0 x) (* 500.0 y)) in (x y) around 0
0.136 * [taylor]: Taking taylor expansion of (- (* 500.0 x) (* 500.0 y)) in y
0.136 * [taylor]: Taking taylor expansion of (* 500.0 x) in y
0.136 * [taylor]: Taking taylor expansion of 500.0 in y
0.136 * [taylor]: Taking taylor expansion of x in y
0.136 * [taylor]: Taking taylor expansion of (* 500.0 y) in y
0.136 * [taylor]: Taking taylor expansion of 500.0 in y
0.136 * [taylor]: Taking taylor expansion of y in y
0.136 * [taylor]: Taking taylor expansion of (- (* 500.0 x) (* 500.0 y)) in x
0.136 * [taylor]: Taking taylor expansion of (* 500.0 x) in x
0.136 * [taylor]: Taking taylor expansion of 500.0 in x
0.136 * [taylor]: Taking taylor expansion of x in x
0.136 * [taylor]: Taking taylor expansion of (* 500.0 y) in x
0.136 * [taylor]: Taking taylor expansion of 500.0 in x
0.136 * [taylor]: Taking taylor expansion of y in x
0.136 * [taylor]: Taking taylor expansion of (- (* 500.0 x) (* 500.0 y)) in x
0.136 * [taylor]: Taking taylor expansion of (* 500.0 x) in x
0.136 * [taylor]: Taking taylor expansion of 500.0 in x
0.136 * [taylor]: Taking taylor expansion of x in x
0.137 * [taylor]: Taking taylor expansion of (* 500.0 y) in x
0.137 * [taylor]: Taking taylor expansion of 500.0 in x
0.137 * [taylor]: Taking taylor expansion of y in x
0.137 * [taylor]: Taking taylor expansion of (neg (* 500.0 y)) in y
0.137 * [taylor]: Taking taylor expansion of (* 500.0 y) in y
0.137 * [taylor]: Taking taylor expansion of 500.0 in y
0.137 * [taylor]: Taking taylor expansion of y in y
0.137 * [taylor]: Taking taylor expansion of 500.0 in y
0.137 * [taylor]: Taking taylor expansion of 0 in y
0.137 * [taylor]: Taking taylor expansion of 0 in y
0.137 * [approximate]: Taking taylor expansion of (- (* 500.0 (/ 1 x)) (* 500.0 (/ 1 y))) in (x y) around 0
0.137 * [taylor]: Taking taylor expansion of (- (* 500.0 (/ 1 x)) (* 500.0 (/ 1 y))) in y
0.137 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 x)) in y
0.137 * [taylor]: Taking taylor expansion of 500.0 in y
0.137 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.137 * [taylor]: Taking taylor expansion of x in y
0.137 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in y
0.137 * [taylor]: Taking taylor expansion of 500.0 in y
0.137 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.138 * [taylor]: Taking taylor expansion of y in y
0.138 * [taylor]: Taking taylor expansion of (- (* 500.0 (/ 1 x)) (* 500.0 (/ 1 y))) in x
0.138 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 x)) in x
0.138 * [taylor]: Taking taylor expansion of 500.0 in x
0.138 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.138 * [taylor]: Taking taylor expansion of x in x
0.138 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in x
0.138 * [taylor]: Taking taylor expansion of 500.0 in x
0.138 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.138 * [taylor]: Taking taylor expansion of y in x
0.138 * [taylor]: Taking taylor expansion of (- (* 500.0 (/ 1 x)) (* 500.0 (/ 1 y))) in x
0.138 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 x)) in x
0.138 * [taylor]: Taking taylor expansion of 500.0 in x
0.138 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.138 * [taylor]: Taking taylor expansion of x in x
0.138 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in x
0.138 * [taylor]: Taking taylor expansion of 500.0 in x
0.138 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.138 * [taylor]: Taking taylor expansion of y in x
0.138 * [taylor]: Taking taylor expansion of 500.0 in y
0.138 * [taylor]: Taking taylor expansion of (neg (* 500.0 (/ 1 y))) in y
0.138 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in y
0.138 * [taylor]: Taking taylor expansion of 500.0 in y
0.138 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.138 * [taylor]: Taking taylor expansion of y in y
0.138 * [taylor]: Taking taylor expansion of 0 in y
0.139 * [taylor]: Taking taylor expansion of 0 in y
0.139 * [taylor]: Taking taylor expansion of 0 in y
0.139 * [approximate]: Taking taylor expansion of (- (* 500.0 (/ 1 y)) (* 500.0 (/ 1 x))) in (x y) around 0
0.139 * [taylor]: Taking taylor expansion of (- (* 500.0 (/ 1 y)) (* 500.0 (/ 1 x))) in y
0.139 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in y
0.139 * [taylor]: Taking taylor expansion of 500.0 in y
0.139 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.139 * [taylor]: Taking taylor expansion of y in y
0.139 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 x)) in y
0.139 * [taylor]: Taking taylor expansion of 500.0 in y
0.139 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.139 * [taylor]: Taking taylor expansion of x in y
0.139 * [taylor]: Taking taylor expansion of (- (* 500.0 (/ 1 y)) (* 500.0 (/ 1 x))) in x
0.140 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in x
0.140 * [taylor]: Taking taylor expansion of 500.0 in x
0.140 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.140 * [taylor]: Taking taylor expansion of y in x
0.140 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 x)) in x
0.140 * [taylor]: Taking taylor expansion of 500.0 in x
0.140 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.140 * [taylor]: Taking taylor expansion of x in x
0.140 * [taylor]: Taking taylor expansion of (- (* 500.0 (/ 1 y)) (* 500.0 (/ 1 x))) in x
0.140 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in x
0.140 * [taylor]: Taking taylor expansion of 500.0 in x
0.140 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.140 * [taylor]: Taking taylor expansion of y in x
0.140 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 x)) in x
0.140 * [taylor]: Taking taylor expansion of 500.0 in x
0.140 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.140 * [taylor]: Taking taylor expansion of x in x
0.140 * [taylor]: Taking taylor expansion of (neg 500.0) in y
0.140 * [taylor]: Taking taylor expansion of 500.0 in y
0.140 * [taylor]: Taking taylor expansion of (* 500.0 (/ 1 y)) in y
0.140 * [taylor]: Taking taylor expansion of 500.0 in y
0.140 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.140 * [taylor]: Taking taylor expansion of y in y
0.140 * [taylor]: Taking taylor expansion of 0 in y
0.141 * [taylor]: Taking taylor expansion of 0 in y
0.141 * [taylor]: Taking taylor expansion of 0 in y
0.141 * * * [progress]: simplifying candidates
0.141 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* (exp (* 500.0 x)) (exp (* 500.0 (neg y))))
  (log (+ (* 500.0 x) (* 500.0 (neg y))))
  (exp (+ (* 500.0 x) (* 500.0 (neg y))))
  (* (cbrt (+ (* 500.0 x) (* 500.0 (neg y)))) (cbrt (+ (* 500.0 x) (* 500.0 (neg y)))))
  (cbrt (+ (* 500.0 x) (* 500.0 (neg y))))
  (* (* (+ (* 500.0 x) (* 500.0 (neg y))) (+ (* 500.0 x) (* 500.0 (neg y)))) (+ (* 500.0 x) (* 500.0 (neg y))))
  (sqrt (+ (* 500.0 x) (* 500.0 (neg y))))
  (sqrt (+ (* 500.0 x) (* 500.0 (neg y))))
  (+ (pow (* 500.0 x) 3) (pow (* 500.0 (neg y)) 3))
  (+ (* (* 500.0 x) (* 500.0 x)) (- (* (* 500.0 (neg y)) (* 500.0 (neg y))) (* (* 500.0 x) (* 500.0 (neg y)))))
  (- (* (* 500.0 x) (* 500.0 x)) (* (* 500.0 (neg y)) (* 500.0 (neg y))))
  (- (* 500.0 x) (* 500.0 (neg y)))
  (+ x (neg y))
  (- (* 500.0 x) (* 500.0 y))
  (- (* 500.0 x) (* 500.0 y))
  (- (* 500.0 x) (* 500.0 y))
0.144 * * [simplify]: iteration  0 :  104  enodes  (cost  90 )
0.146 * * [simplify]: iteration  1 :  435  enodes  (cost  69 )
0.157 * * [simplify]: iteration  2 :  1927  enodes  (cost  66 )
0.204 * * [simplify]: iteration  3 :  5002  enodes  (cost  65 )
0.204 * [simplify]: Simplified to:
   (exp (* 500.0 (- x y)))
  (+ (log 500.0) (log (- x y)))
  (exp (* 500.0 (- x y)))
  (* (cbrt (+ (* 500.0 x) (* 500.0 (neg y)))) (cbrt (+ (* 500.0 x) (* 500.0 (neg y)))))
  (cbrt (+ (* 500.0 x) (* 500.0 (neg y))))
  (pow (* 500.0 (- x y)) 3)
  (sqrt (+ (* 500.0 x) (* 500.0 (neg y))))
  (sqrt (+ (* 500.0 x) (* 500.0 (neg y))))
  (- (pow (* 500.0 x) 3) (pow (* 500.0 y) 3))
  (* 500.0 (+ (* x (* 500.0 x)) (* y (* 500.0 (+ x y)))))
  (* (* 500.0 500.0) (- (* x x) (* y y)))
  (* 500.0 (+ x y))
  (- x y)
  (* 500.0 (- x y))
  (* 500.0 (- x y))
  (* 500.0 (- x y))
0.204 * * * [progress]: adding candidates to table
0.227 * [progress]: [Phase 3 of 3] Extracting.
0.227 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) (* 500.0 (- x y)))> #<alt (λ (x y) (+ (* 500.0 x) (* 500.0 (neg y))))>)
0.227 * * * [regime-changes]: Trying 4 branch expressions: ((- x y) (* 500.0 (- x y)) y x)
0.227 * * * * [regimes]: Trying to branch on (- x y) from (#<alt (λ (x y) (* 500.0 (- x y)))> #<alt (λ (x y) (+ (* 500.0 x) (* 500.0 (neg y))))>)
0.261 * * * * [regimes]: Trying to branch on (* 500.0 (- x y)) from (#<alt (λ (x y) (* 500.0 (- x y)))> #<alt (λ (x y) (+ (* 500.0 x) (* 500.0 (neg y))))>)
0.292 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) (* 500.0 (- x y)))> #<alt (λ (x y) (+ (* 500.0 x) (* 500.0 (neg y))))>)
0.325 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) (* 500.0 (- x y)))> #<alt (λ (x y) (+ (* 500.0 x) (* 500.0 (neg y))))>)
0.356 * * * [regime]: Found split indices: #<option (#s(si 0 255))>
0.356 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 500.0 (- x y))
0.357 * * [simplify]: iteration  0 :  6  enodes  (cost  2 )
0.357 * * [simplify]: iteration  1 :  6  enodes  (cost  2 )
0.357 * [simplify]: Simplified to:
   (* 500.0 (- x y))
0.886 * [regime-testing]: Baseline error score: 0.019377422177772222
0.887 * [regime-testing]: Oracle error score: 0.008751093886735842
0.888 * [regime-testing]: End program error score: 0.019377422177772222